In defense of Seattle/KCM1, there are some (OK, just one:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4091894/) studies that show that they have better outcomes for GCS<8 trauma patients when compared to other cities in the ROC database (cities like Portland, Pittsburgh, Toronto, etc). I need to dig through the study more, but basically places that intubated more aggressively had better overall outcomes for these patients, however among all cities/systems, intubated patients did worse even when controlled for injury severity. Kind of a strange conclusion, and I'm not sure how much useful data we can actually take from it.
@KingCountyMedic , I thought I remember reading in some JEMS article written by the Medic One folks that the average KCM1/Seattle medic had between 13-16 tubes a year. By your numbers, the average medic is pushing 100 tubes a year, which seems extraordinarily high in a system that only runs like 60,000 ALS calls a year (in fact, that would mean that almost 15% of your patients get intubated).